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Pros: Stable, quiet, it works. PCPC replaced my first unit, with little fussiness. Tech support helpful.
Cons: First unit had an internal mechanical rattle. A loose screw or nut.
Other Thoughts: Just a caution, and not meant as a criticism of this fine power supply -- think twice about using this PSU with a non- "Pure Sine Wave" UPS.
I'm using a slightly older model of this PSU: Silencer PPCS750QBL, now discontinued, but I'm totally happy with it.
PC Power & Cooling's tech support promptly replied to my question about its compatibility with UPS's which have a simulated sine wave output - units like many of the Smart-UPS produced by APC / American Power Conversion.
Their advice, in full:
"The PPCS750QBL will work with a simulated sine wave, but I recommend you do not.
A derived, stepped, or simulated sine wave can damage the active power factor correction in our power supply over time.
Typically, a UPS will only go to battery power when there is an interruption in the AC current. This is the only time the sine wave characteristics come into play. If the power supply is exposed to a simulated sine wave for extended periods of time or frequently, the PFC can become damaged and fail prematurely."